Furnace



June 6, 1933. C;` l. MURDOCK 1,912,398

FURNACE Filed March 16, 1931 2 Sheets-Sheet l TML N l www@ l ATTORNEYS June 6, 1933. c. l. MURDocK FURNACE 2 Sheets-Sheet 2 Filed March 16, 1951 INVENTOR C/Iazj cs Z /ZarcaC// ATTORNEYSr Patented June 6, 1933 PATENT oFFlcI-z CHARLES I. MUB'DOCK, OF .ANN ARIEGE, MICHIGAN rununen 'Application led March 16, 1931. Serial No. 523,078.-

'lhe invention relates to heating furnaces and more particularly -to the hot air type designed to be operated ywith either liquid or solid fuel. It is the object of the inven- 5 tion rst, to obtain a greater eliiciency and second, toY eliminate or greatly reduce the sound produced by the burner. With these objects in view the invention consists in the construction including heat and sound insulation as hereinafter set forth.

ln the drawings: Figure l is a front elevation of my improved furnace with the outer jacket removed;

Figure 2 is a side elevation thereof, .and

Figure 3 is a plan View As above stated, my improved furnace is of the hot air type and comprises a cylindrical base section A in which is located the oil or gas burner orA coal grate (not shown) and the combustion chamber therefor. Rising from this cylindrical base is a. section B which in cross section tapers upward to an apex C and in longitudinal section flares outwardly towards its upper end. On opposite sides of the section B are series of spaced flues D, D which are largest at the upper ends and taper downwardly. The lower ends of these iues are connected to headers E, E which in turn are connected to a flue pipe F leading to the chimney. The upper ends of the ilues D and D are individually connected to the upper end of the section B by nipples G extending inward from the ilues telescopically engaging nipples H upon the section E. Thus the hot gases formed as the products of combustion of the ire will pass upward through the chamber in the section B, thence through the nipples H and G into the tlues D and D', then downward into the headers E and E and nally through the flue F to the chimney. The space surrounding the structure so far described as well as the space intermediate the fines D, D and between the lsame and the section B is enclosed by a suitable heating jacket (not shown) connected with the distributing pipes for the hot air.

With the construction as thus far described, it has been found that the noise of the fire when in operation will be communicated to the air being heated and will be conveyed through the hot air tubes to the rooms connected therewith. Furthermore, a

considerable portion of the radiant heat from the section B will escape without communicating its heat units to the air being heated. I have devised `a construction in which I place heat and sound insulation in such position as to be effective both in con 60 serving. heat and preventing noise, the construction being as follows:

0n the. inner side of the lues D and D I arrange a sheet of insulation J which extends from the bracket K supporting the headers E and E upward to the nipples Gro This insulation is of suitable material such as mineral wool which has both sound and heat resisting qualities and in order to hold it in shape it is provided on its outer face im with an imperforate metal facin L which bears against the flues D. The inner face of the insulating sheet J is also reinforced but preferably by an open mesh fabric such as a wire screen L which will hold the min- 75 eral wool in place without the production of a continuous metallic surface. Such construction is desirable inasmuch as it is more' effective for sound insulation than where a continuous metallic surface is exposed on the inner side of the mineral wool. ln addition to the insulating sheets J, sheets M and N are arranged at the' front and at the rear of the furnace so as to complete the enclosure of the space inside the lues D.

These sheets are formed in a similar manner with an open mesh reinforcing fabric on the inner side and also suitable reinforcement on the outer side.

- With the construction as described, the

radiant heat from the fairly highly heated section B will impinge agamst the insulating sheets J, M and N, being either deflected backward or absorbed. The portion of the radiant energy whichis absorbed will be ation of the burner be largely absorbed by the mineral wool so as to greatly decrease or entirely eliminate the noise which reaches the rooms above.

What I claim as my invention is: 1. The combination with a hot air heating furnace provided .with a central section containing a combustion chamber and taper-V ing towards its upper end, ofA a series of Hues on opposite sides of said central section spaced therefrom and tapering from their up er ends downward, the upper ends of said dhes being individually connected to the upper end of said central section, headers connecting the lower ends of said lues and leading to the chimney, a thermal and n sound insulating wall arranged in the space between said iues and central section and adjacent to the inner walls of the lues and insulating walls extending across the front and rear ends of said furnace.

2. In a hot air heating furnace, the combination of a central section containing a combustion chamber, an outer section for receiving the gaseous products of combustion therefrom and an air jacket surrounding said sections, of an insulating wall 'interosed between said sections, said wall having one of its faces covered with a conduct-v ins material for transmitting the absorbed r iant heat to the air through conduction.

3. In a het air heating furnace, the combination with a central section containing Y the combustion chamber and an outer section for reoeivin combustion there om, of an insulating wall between said sections formed of fibrous material and a metallic reenforcement for holding said material in position.

4.*In a hot air heating furnace, the com-A bination with a central section containin a combustion chamber and an outer sectlon for receiving the gaseous products of combustion therefrom, of an insulatingV wall interposed between said sections, said wall being formed of a fibrous material, a sheet metal covering forthe outer face of said wall and an' a rtured reinforcement for the inner face o said wall.

5.*In a hot air heating furnace, the combination with a central section containing the combustion chamber and an outer section 4for receivin the gaseous products of combustion there rom, of an insulating wall interposed between said sections, said wall' being formed of'brous material, a continuous sheet metal covering for the outer face of said wall and a wire screen reinforcement for the inner face thereof.

In testimon whereof I allx mysignature.

HARLES I. MURDOCK.

the gaseous products of' 

